21413444267 has 2 divisors, whose sum is σ = 21413444268. Its totient is φ = 21413444266.

The previous prime is 21413444263. The next prime is 21413444293. The reversal of 21413444267 is 76244431412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21413444267 - 2² = 21413444263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21413444267.

It is not a weakly prime, because it can be changed into another prime (21413444263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706722133 + 10706722134.

It is an arithmetic number, because the mean of its divisors is an integer number (10706722134).

Almost surely, 2^21413444267 is an apocalyptic number.

21413444267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21413444267 is an equidigital number, since it uses as much as digits as its factorization.

21413444267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 38.

Adding to 21413444267 its reverse (76244431412), we get a palindrome (97657875679).

The spelling of 21413444267 in words is "twenty-one billion, four hundred thirteen million, four hundred forty-four thousand, two hundred sixty-seven".